Canada



(Nb Model.)

H. D. WALLAOE. STONE DRESSING MAOHIVNVE'.

, 'Patentd Feb; 5

UNITED STATES PATENT Orricn.

STONE-DRESSING MACHINE.

SPECIFICATION forming To aZZ whom it may concern:

Be it known that I, HOWARD D. WALLACE, of St. George, in the county of Charlotte and Province of New Brunswick, Canada, have invented certain new and useful Improvements in Stone-Dressing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in stone-dressing machines; and it consists in the combination of suitable uprights provided with guides, a reciprocating frame which moves upon the guides, a rotating standard placed in the reciprocating frame and carrying suitable cutter-disks, and a mechanism for reciprocating the frames. j

It still further consists in the combination of a reciprocating frame provided with a rotating standard carrying disks, and screws by i'neans of which the disks can be adjusted back and forth in relation to each other, according as a wide .or narrow surface is to be dressed, as will be more fully described hereinafter.

The object of my invention is to provide a machine for dressing the surfaces of stone, in which two or more disks placed one above the other are used, the disks being set atany desired angle to the stone, which is moved along by means of a carriage, while the disks are. given a reciprocating movement at right angles thereto.

Figure lis a side elevation of my invention.

. Fig. 2 is a plan view of the same. Fig. 3 is an enlarged detail view.

A represents two uprights,which are placed in a line with each other, and at right angles to the track upon which the stone is moved by means of the carriage K, which is moved back and forth on its track L by means of any suitable mechanism, and is provided with mechanism by means of which an adjustment at right angles to its line of travel can be made, in order to regulate the depth of the cut, and also a circular motion, which is necessary in cutting tapered stones or molded of them.

part of Letters Patent No. 292,880, dated February 5, 1884.

Application filed April 26, 1883. (X0 model.)

work. To each of these standards Aare secured either two short guides, B, by means of suitable brackets, O, or one longer guide, as may be preferred. Loosely passed over these guides B are the prongs D of the vertically reciprocating frame E, which is attached by means of a connecting-rod, F, tothe crank G or any other suitable mechanism for imparting a reciprocating movement to the frame upon the guides 13. The frame is provided with two prongs, D, at each of its ends, as shown in Fig. 1, so as to be braced rigidly against any lateral play or movement, while the disks are in operation. The two end pieces of the frame E are connected rigidlytogether, either by means of the rotating rod H, or by a separate and distinct piece, as may be preferred. Each one of these end pieces, D, of the frame E has a socket made in its inner side, into which the circular disks G are fitted. These disks G are secured to the opposite ends of the rotating standard H,which has the diskcarriers I movably connected thereto in any suitable manner. Each one of these disk-carriers has journaled at its outer end a suitable disk, J ,which,while they can be rotated when they come in contact with the stone, have no movement of their own. These disk-carriers have their inner ends attached to the rotating standard in any manner that may be preferred, and are made adjustable in relation to each other by means of the right-and-left threaded screw 0, which passes through both By means of the screw the two .disks J. can be moved near together or far apart, according as the surface'pf the stone to be dressed is wide or narrow. As the rotating standard H' can be turned freely upon its vertical axes, the disks can be set at any desired angle in relation to the stone, which is moved along upon a carriage and at right angles to the line of travel of the two disks as they are made to reciprocate. As the disks come in contact with the surface of the stone, they are made to revolve, and thus constantly present a new surface to the stone which is being dressed.

The stone having been placed upon its car riage, and the disk having been given a reciprocatin g movement by the crank or other de- 'vice G, the disks out or dress the surface of the stone accurately'and smoothly, and with much greater rapidity than can be accomplished by hand.

Having thus described my invention, I clain1- 1. In a stone-cutting machine, the combination of suitable guides secured to suitable uprights or supports, a reciprocating frame attached to the guides, a rotating standard to which the cutting-disks are connected, and a screw placed in the frame for regulating the distance between the cutting-disks, substantially as shown.

2. In a stone-cutting machine, the combination of the posts A, having suitable guides secured to them, the verticallyreciprocating frame attached to the guides, the end pieces, D, of the reciprocating frame,having suitable recesses in their inner sides, the partially-r0- tating rod H,having the disks G secured to its ends, and fitting in the recesses in the parts D, the cutting-disks, and a screw for regulating the distance between them, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HOWARD DOUGLAS WALLACE.

\Vitnesses:

THOMAS BARRY, JOHN OBRIEN. 

